In contrast to CD44, ABCG2 knockdown inhibited clonogenic activities of both LAPC9 (Figure 9H; Supplementary Figure 11E) and Du145 (not shown) CD44+ cells, which is consistent with ABCG2 enrichment and also suggests its functional significance in the two CD44+ PCa cell populations. The gene discussed is CD44; the disease is posterior cortical atrophy.